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Finding the Fourth Proportional to 148,866.40, 223,040.40 and 128,130.40

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Solution

The fourth proportional to 148,866.40, 223,040.40 and 128,130.40 is: 191,972.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,866.40 : 223,040.40 = 128,130.40 : x
  2. Step 2: Convert to fraction form
    148,866.40/223,040.40 = 128,130.40/x
  3. Step 3: Cross multiply
    148,866.40x = 223,040.40 × 128,130.40
  4. Step 4: Simplify right side
    148,866.40x = 28,578,255,668.16
  5. Step 5: Solve for x
    x = 28,578,255,668.16/148,866.40
  6. Step 6: Final answer
    x = 191,972.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.